Power Amplifier Ypsilon Electronics HYPERION Black

Hybrid monoblock with no overall feedback and a two-stage signal path

The Ypsilon Electronics HYPERION is a high-power hybrid power amplifier in monoblock form, designed for demanding loudspeakers with low and variable impedance. The design is built on the principle of no overall feedback and on a signal path shortened to the absolute minimum, consisting of just two amplification stages. Output power reaches 370 W rms into 8 ohms, 650 W rms into 4 ohms and 1150 W rms into 2 ohms, which corresponds to the ability to drive even impedance-demanding loads without restricting dynamics.

The first amplification stage uses a double triode with low output impedance, connected to the power stage via a wide-bandwidth silver interstage transformer. The input is likewise transformer-coupled by a specially manufactured silver transformer that provides a precisely balanced input signal; this is also measurable in the response, with a +2.5 dB rise at 50 kHz and a frequency range of 6 Hz \u2013 80 kHz (\u22123 dB). The output stage works in a unique \u201cbalanced single-ended\u201d topology biased in class A up to 100 W into 8 ohms. Gain is 20\u00d7 (26 dB), input impedance 22 kohms, output impedance 0.3 ohm.

The power supply is built around large chokes for smooth filtering and a set of fast, low-impedance capacitors. The mains transformer uses a high-quality core material and a specific winding technique aimed at suppressing mechanical, magnetic and electrical noise. All internal wiring consists of in-house made silver conductor with Teflon insulation. The 400 W idle consumption and the weight of 95 kg per channel result from the massive energy reserves and from class A operation over a substantial part of the power range.

The combination of transformer coupling, a simple signal path and the absence of global feedback translates into stable localisation of instruments, legible micro-detail and natural dynamic build-up without compression in loud passages. The large power reservoir keeps the bass region under control even as impedance drops, while the single-ended character of the output stage preserves transparency and delicacy in the upper registers.

Key features

• Power: 370 W/8 \u03a9, 650 W/4 \u03a9, 1150 W/2 \u03a9
• Topology: Hybrid monoblock with no overall feedback
• Signal path: Only two amplification stages
• Transformers: Silver input and interstage transformers
• Power supply: Choke filtering and fast capacitors